All five suspects are charged with conspiracy and with the use or attempted use of explosive devices.

A conviction on a conspiracy count carries a maximum penalty of five years in prison and a $250,000 fine. A conviction on use or attempted use of explosives carries a maximum penalty of 20 years in prison and a $250,000 fine.

As they sat before a courtroom packed with law enforcement and family members, the five suspects wore street clothes, and shackles at their wrists and ankles.

Each answered "Yes," or "Yes your Honor" when the judge asked questions.

The U.S. Attorney requested the suspects remain in detention until their next hearing, because they are considered a flight risk and a danger to the community, given the charges.

The five suspects will remain in the custody of U.S. Marshals until their preliminary and detention hearing, which will take place Monday, May 7.